-49.4% is the change from 168 to 85
Calculation steps:
[( 85 - 168 ) ÷ 168] x 100 = -49.4%
Formula
Percentage change = [(85 - 168) / 168] x 100
Subtract the new number by the original number
85 - 168 = -83
-83 ÷ 168 = -0.49404761904761907
-0.49404761904761907 x 100 = -49.4%